You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Evening.

USER: Good Evening, my name is Margaret Clark.

ASSISTANT: Ok Clark, how may I aid you?

USER: Actually, on 07/07, I want to travel from AUS to OAK to attend my sister's marriage. Will you please help me in booking my ticket?

ASSISTANT: Sure, I will search for the available flights. Can you please tell me your return date?

USER: My return date is on 07/09.

ASSISTANT: Sorry to inform you Clark, there are no flights available in the dates you provided.

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

ASSISTANT: It's my pleasure. Thank you for reaching us.

USER: You are welcome.