You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Raymond Adams, want to travel from SEA to AUS. Can you help me in this?

ASSISTANT: Sure, I will help you in flight ticket reservation. Can you tell me your travel dates please?

USER: My travel dates are from 07/21 to 07/23.

ASSISTANT: Thank you for providing the flight details. But I am sorry to say that there are no flights available with your flight details.

USER: It's ok, thank you.

ASSISTANT: Thank you.