You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Mark Roberts.

ASSISTANT: How may I help you?

USER: I would like to spend my time at Museum in San Francisco. Can you help me in booking a ticket from OAK to SFO?

ASSISTANT: Sure Mark, may I know your trip dates please?

USER: My planned journey dates are 05/08 and 05/10.

ASSISTANT: There are no flights available with your preferences.

USER: Its ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.