You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Myself Betty Wright. I want to attend my cousin's marriage.I want to book a ticket.

ASSISTANT: Please can you provide journey dates and airport codes?

USER: My airport codes are from TX-HOU to CA-OAK. My trip dates are from 07/01 to 07/03.

ASSISTANT: Wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flights available.

USER: Ok, that's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.