You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Melissa Phillips this side.

ASSISTANT: Yes, Phillips.

USER: I will be booking a reservation on the route from MSP to Denver DEN, can you help me with my booking?

ASSISTANT: Please, provide me your trip dates?

USER: My trip dates will be from 01/24 to 01/26.

ASSISTANT: Sorry Phillips, there are no flights with your request.

USER: That's fine, thank you for assisting me, great service by your agency.

ASSISTANT: Welcome, thank you for reaching us.

USER: You are welcome.