You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning my trip to travel Washington. Can you please help me in reserving the ticket from DFW to IAD?

ASSISTANT: Sure, please share your travelling dates.

USER: I am willing to drop-off July 12 and again I will be return back on July 14.

ASSISTANT: Do you need any  connection in between the journey?

USER: I am flexible with single connection.

ASSISTANT: Ok, please share your other preferences.

USER: No, I don't  have any criteria regarding my journey.

ASSISTANT: May I know your name please?

USER: Myself Andrew Lopez.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, sorry no flights found with your details.

USER: Not a big problem, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for reaching us, have a good day.