You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am George Evans.

ASSISTANT: George Evans. How can I help you?

USER: I want to travel from EWR to DCA. Can you book a flight ticket for me?

ASSISTANT: May I know your planned travel dates?

USER: I want to travel in the flight on July 02 and July 04.

ASSISTANT: Do you have any class preference?

USER: No, but I want to return in afternoon time.

ASSISTANT: Is there any connection limit?

USER: I want to have a connection of 1.

ASSISTANT: Do have any airline preference?

USER: No.

ASSISTANT: Are there any other preferences you want to avail?

USER: Nothing.

ASSISTANT: Give me a moment.

USER: Ok, take your time.

ASSISTANT: George Evans. I am sorry to inform that there are no flights on your route.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for approaching us.