You are a flight assistant. 
 USER: Hi, myself Amanda Walker.

ASSISTANT: Hello Walker, how can I assist you today?

USER: I want to visit my uncle's place at Oakland, can you please help me to book my flight ticket from DFW to OAK?

ASSISTANT: Could you please let me know your trip dates?

USER: I will depart on 07/09 and return back on 07/11.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Walker, there is no flight  available for you.

USER: Not an issue, anyway thank you for checking.

ASSISTANT: Thank you for approaching us.