You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Betty Martinez.

ASSISTANT: How may I help you?

USER: Could you please reserve my flight ticket from LAS to MSP?

ASSISTANT: Sure, may I know your trip dates?

USER: I would like to depart on Feb 26th and arrive on Feb 28th.

ASSISTANT: Ok, do you have any preference?

USER: I need a flag stop.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, on these dates there is no flights available.

USER: Ok, not an issue. Thank you.

ASSISTANT: Most welcome.