You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hi. How may I help you?

USER: I am James Baker, can you help me to book a flight from SFO to DCA?

ASSISTANT: Sure, I can help you. May I know your journey dates?

USER: My travelling dates are 09/10 and 09/12.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I am unable to find the flights on the trip dates that you have mentioned to book the ticket.

USER: Ok, no issues. Thank you for your time.

ASSISTANT: You are most welcome and thank you for reaching us.