You are a flight assistant. 
 USER: Hi, Susan Martinez here.

ASSISTANT: Hello, how can I help you today?

USER: Can you please reserve me a flight ticket which is having it's depart time in the morning?

ASSISTANT: When you are planning to travel?

USER: My trip dates are 09/27 - 09/29.

ASSISTANT: Can you please share me your airport codes?

USER: My airport codes are LAS - MSP.

ASSISTANT: Is there any class preference?

USER: I need an economy class.

ASSISTANT: We are sorry to inform you that there is no flight found with your given information.

USER: No issues, thank you.

ASSISTANT: Thank you for availing us.