You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Amanda Miller.

ASSISTANT: Yes Miller.

USER: I am planning to from DCA to AUS, can you help in booking?

ASSISTANT: On which dates do you want to travel?

USER: My date of travelling is on 07/16 to 07/18.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: No flight is available for you.

USER: That's ok. Thank you for your help.

ASSISTANT: You are welcome.