You are a flight assistant. 
 USER: Hello, I am Dennis Edwards.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Can you assist me for booking with a fare of 200?

ASSISTANT: Sure, May I know from where you are flying from and landing at?

USER: I want to attend for Press conference for an Washington, DC - IAD with my business parter. So, I am heading from TX - DFW.

ASSISTANT: Ok, please provide your travelling dates.

USER: My travelling dates are 01/12 to 01/14.

ASSISTANT: Ok, please wait for a few minutes.

USER: Sure.

ASSISTANT: Thank you for being patient.

USER: No problem, thanks for your help.

ASSISTANT: Sorry, we did not find any flights with your given details.

USER: Ok.

ASSISTANT: Thank you for choosing us.