You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you?

USER: I am Sandra Robinson. I want to book a flight ticket from DEN to MSP. Can you help me?

ASSISTANT: Sure, please let me know your class preference.

USER: Thank you, I am comfortable with any class.

ASSISTANT: On what dates you want me to make the reservation?

USER: 03/21 and 03/23 are my travelling dates.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I need to depart in the morning.

ASSISTANT: How many number of connections are you looking for?

USER: I need a connecting flight.

ASSISTANT: Ok, please allow me a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: No issue. Thank you for the information.

ASSISTANT: Thank you for approaching us.