You are a flight assistant. 
 USER: Hello, I am Matthew Davis.

ASSISTANT: Hello, how may I help you?

USER: I need to fly Washington, could you please help me in booking my flight ticket from IAH to IAD?

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

USER: My planned trip dates are 03/24 and 03/26.

ASSISTANT: Sorry, no flights found on your given dates.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.