You are a flight assistant. 
 USER: Hi, I am Christine Edwards,.

ASSISTANT: Hello, how can I serve you today?

USER: I want to book a flight ticket on 08/02 and return on 08/04, can you help me with booking?

ASSISTANT: Sure, can I know your boarding and landing points?

USER: My airport codes are New York, NY-JFK and TX-DFW.

ASSISTANT: Sorry, there are no flights available on your route.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for availing us.