You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Frank Gonzalez here and I would like to attend a business meeting in Phoenix, can you please reserve a flight ticket from OAK to PHX?

ASSISTANT: Sure, can you share your trip dates?

USER: Thank you, my departure is on Feb 29 and please book my return ticket also on Mar 02.

ASSISTANT: Do you have any preferences?

USER: I would like to departure at evening time.

ASSISTANT: Sorry, there is no flight found on your given dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.