You are a flight assistant. 
 USER: Hello, I am Sarah Jones.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a ticket from DCA to LGA?

ASSISTANT: Sure, I will help you. Can you please share the dates of journey?

USER: Sure, I would like to go on 09/29 and return back on 10/01.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: Sorry, there is no connecting flight available on your required dates.

USER: That's ok, thank you for checking.

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

USER: Welcome.