You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me with booking a flight ticket from DEN to IAD?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My travel dates are Oct 14 and 16.

ASSISTANT: Ok, do you need any connection in between the journey?

USER: I need a connecting flight.

ASSISTANT: Ok, please share your other preferences.

USER: No other preferences.

ASSISTANT: May I know your name please?

USER: My name is David Walker.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

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

USER: Ok, no issues. Thanks for the information.

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