You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I have to change my reservation as I have to prepare for my exams, can you please help me?

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: Can you please provide your name to check your reservation status in our database?

USER: My name is Patricia Baker.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Patricia Baker, I have found your reservation. Can you please provide your airport codes of journey?

USER: My airport codes are IAD and DCA.

ASSISTANT: May I know your planned dates of journey please?

USER: My travel dates are Apr 18 and Apr 20.

ASSISTANT: Do you have any connection limit preference for this trip?

USER: I need a single connection.

ASSISTANT: Do you have any class preference for this trip?

USER: No.

ASSISTANT: May I know your specific depart and arrival timings for this trip?

USER: I would like to depart in the morning.

ASSISTANT: Do you have any specific airline preference?

USER: I prefer to travel in Delta airlines.

ASSISTANT: Flight-1011 is available in United Airlines with single connection on this route with a ticket fare of 100, shall I proceed to book your ticket in this flight?

USER: I am ok with that, please proceed.

ASSISTANT: Patricia Baker, your ticket is booked in economy class and flight departs at 9:00AM and arrives at 19:00PM.

USER: Thank you for the help.

ASSISTANT: Thank you for contacting us, have a safe journey.