You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to make my reservation from SFO to DCA? I have to meet my business partner at Washington-DC.

ASSISTANT: Ok, please tell your travelling dates.

USER: Sure, I will depart on 01/16 and return on 01/18.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: May I know your name to proceed further please?

USER: My name is Christopher Harris.

ASSISTANT: Sorry to inform you, there is no flight available which satisfies your specifications.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.