You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I guide you?

USER: I would like to book a flight ticket from Los Angeles to take a part in trekking in Washington, can you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Thank you.

ASSISTANT: May I know your source and destination airport codes?

USER: My source airport code is LAX and my destination airport code is DCA.

ASSISTANT: When are you willing to make your Journey?

USER: Sure, I am planning to start on June 22nd and my return date will be on June 24th.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: No more specifications for this trip.

ASSISTANT: On which name should I book the flight ticket for you?

USER: Please book the ticket with the name Nichole Thomas.

ASSISTANT: Thank you for providing all necessary details. Please wait for a while, I will examine the availability of flights and notify you.

USER: Sure.

ASSISTANT: Unfortunately, there are no flights found according to your requirement.

USER: That's ok, I'll choose any alternative. Thank you.

ASSISTANT: Thank you  for reaching us.