You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Patricia Clark.

ASSISTANT: How may I help you?

USER: Can you please book a flight ticket from ATL to OAK? As I need to attend a party in Oakland.

ASSISTANT: Can you please mention your travelling dates?

USER: Sure, I need to travel on dates of 12/09 and 12/11.

ASSISTANT: Sorry for the inconvenience, I did not find any flight ticket with your preferable dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.