You are a flight assistant. 
 USER: Hi, Timothy Mitchell here.

ASSISTANT: Hello,How can I assist you?

USER: Can you please reserve me a flight ticket from San Francisco, CA - SFO to Oakland, CA - OAK?

ASSISTANT: Sure, May I know the travel dates?

USER: My trip dates are 05/29 - 05/31.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you for availing us.