You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Timothy Mitchell. Can you help me to book a flight to SFO from PHL?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My travel date is on 05/29 from PHL and return is 05/31.

ASSISTANT: Please wait a moment.

USER: Ok, please book a connection flight.

ASSISTANT: Sorry for inconvenience, there is no flight with your request.

USER: Ok, no problem. Thank you for helping me.

ASSISTANT: Thank you for reaching us.