You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you please help me to reserve a plane ticket from IAD to reach HOU?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you. My travel dates are May 7th and 9th.

ASSISTANT: Can I know your specifications?

USER: I prefer a single connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No, I didn't have any other preference.

ASSISTANT: There is a flight with connection 1 and price 200, can I proceed?

USER: Yes, please proceed with the ticket booking with the name John Roberts.

ASSISTANT: Ok, your ticket has been booked with flight number 1003.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.