You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Helen Martinez here.

ASSISTANT: How may I help you?

USER: Reserve a flight ticket for me that is from MSP to HOU. For my business trip to Houston.

ASSISTANT: Sure, may I know on what dates that you are planning to travel?

USER: Ok I want to reach Houston on 11/09 and start my journey on 11/07.

ASSISTANT: Please give me a moment to find the flight.

USER: Sure.

ASSISTANT: There is no flight that is obtained to book your flight ticket. Sorry for the trouble.

USER: Ok, not a problem. I will try with other airlines. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.