You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Anthony Moore. I want to book a ticket from HOU to CLT to meet my parents, can you help me in booking?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: I am departing on 05/28 and return on 05/30.

ASSISTANT: Wait a moment please.

USER: Sure, take your time.

ASSISTANT: Anthony Moore, there are no flights available on this route due to heavy bookings. Thank you for contacting us.

USER: That's ok, thank you for your help.

ASSISTANT: Welcome.