You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am looking for a direct flight from SFO to IAD. Can you please help me with booking a flight ticket?

ASSISTANT: May I know your travelling dates please?

USER: My travel dates are July 24 and July 26.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the afternoon time and return in the morning time.

ASSISTANT: Sorry for inconvenience, there were no flights running at that location due to abnormal weather conditions.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: May I know your name please?

USER: Myself Christopher Robinson.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.