You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Sandra Martin. Can you please help me in booking a flight ticket from IAH to MSP?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I would like to fly on 01/30 and return on 02/01.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 300 with flight number 1001. Shall I proceed with this flight?

USER: Make sure that airline preference is normal cost.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you.