You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Frank Walker here.

ASSISTANT: How may I help you?

USER: I would like to book a ticket from LAX to MSP, can you please help me with that?

ASSISTANT: Frank Walker, at what time are you planning to depart and return?

USER: I would like to depart during morning time.

ASSISTANT: Could you please provide me your travel dates?

USER: The travel dates are from 04/21 to 04/23.

ASSISTANT: Do you have any airline preference?

USER: No, but I need a flight with 1 connection limit.

ASSISTANT: Do you have any criteria about class?

USER: No, thank you.

ASSISTANT: Sorry to intimate you, no flights are found with your criteria.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you very much for approaching our agency.