You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: This is Alexander Green. I would like to book a ticket from SFO to IAD where I have to attend a global meet.

ASSISTANT: Sure, may I know your travelling dates?

USER: My preferred travel dates are as follows Oct 07 and Oct 09.

ASSISTANT: Are you fine with connecting flight?

USER: Yes, I would like to travel by single connection flight.

ASSISTANT: Do you have any requirements?

USER: Well, yes my depart shall be in the evening and return in the evening too.

ASSISTANT: Sorry to say, no flight is available for you.

USER: No issue, thank you very much for the information.

ASSISTANT: Thank you for reaching us.