You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello, how can I help you today?

USER: I am Mitchell Walker. I want to book a flight ticket to attend an event from TX-DFW to DC-IAD. Can you help me?

ASSISTANT: Sure, kindly mention your travel dates?

USER: 02/19 and 02/21 are my travelling dates.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: No issues. Thank you for your help.

ASSISTANT: Thanks for reaching us.