You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I need to change an existing reservation, can you please help me out?

ASSISTANT: Sure, I am here to help you for this. Let me check your reservation status in our records.

USER: Thank you, I am Linda Lewis here.

ASSISTANT: Please wait for a while. I found a your reservation. May I know your new airport codes?

USER: My recent airports code are BOS and OAK respectively.

ASSISTANT: Can you please share me your travel dates?

USER: My travelling dates are Jul, 25 and 27 respectively.

ASSISTANT: Is there any other specifications regarding your journey?

USER: Yes, flight has to be with a single connection.

ASSISTANT: As per your data, there is a flight with Delta Airlines and the ticket fare is 200. Shall I proceed for this?

USER: Please go ahead for booking.

ASSISTANT: Your ticket is reserved in economy class with the flight-1021. Your depart time is 20:00 PM and again your arrival time is 8:00 AM.

USER: Thank you for your help.

ASSISTANT: Thank you very much for approaching our agency.