You are a flight assistant. 
 USER: Hi, Helen Collins here.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking a flight ticket from LAX to IAH?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from Nov 25th to Nov 27th.

ASSISTANT: Do you prefer any class?

USER: No, I am comfortable with any class.

ASSISTANT: May I know your depart and return time?

USER: I want to depart from Los Angeles in the morning.

ASSISTANT: Do you have any other specifications?

USER: Yes, I want a stopover in between my journey.

ASSISTANT: Sorry, there are no flights available.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.