You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel from JFK to IAH as a holiday trip. Can you help me to book a ticket?

ASSISTANT: Sure, can you please specify me your dates of travel?

USER: My trip dates are 08/27 and 08/29.

ASSISTANT: Do you have any particular time for departing and returning?

USER: My departure time is afternoon.

ASSISTANT: May I know your name?

USER: Angela White here.

ASSISTANT: Sorry, no flight is available for you.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.