You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER:  As I am a scientist, I want to attend science festival with my students at Denver. Can you do the reservation?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My journey dates are 03/23 and 03/25.

ASSISTANT: May I know your airport codes?

USER: My airport codes are MSP-DEN.

ASSISTANT: May I know your depart and return timings?

USER: Return time is evening.

ASSISTANT: There is a connecting flight 1027 of UA airlines, can I proceed?

USER: Go ahead.

ASSISTANT: May I know your name?

USER: Jessica Clark here.

ASSISTANT: Your booking is done in economy class.

USER: Thank you.

ASSISTANT: Welcome.