You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Ashley Gonzalez here. I need your help in booking of a flight ticket from DEN to MSP for an important business meeting, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Sure, I am here to help you out. Please share me your trip dates.

USER: Sure, I am planning to leave on 01/26 and please book my return ticket on 01/28.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: Sorry Ashley, there is no flight in your route with your dates.

USER: Oh! So sad to hear that.

ASSISTANT: Thank you for reaching us.

USER: Anyway, thank you for the information.