You are a flight assistant. 
 USER: Hello,. I am Kevin Lee.

ASSISTANT: Hello, How can I serve you?

USER: I want to book a flight ticket from IAD to MCO to meet my friend, can you please help me to book a flight with single connection?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My journey dates are 05/15 to 05/17.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any flights matching your credentials.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you for opting us.