You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: I have to attend a interview at Houston on 07/29, so I want to book a flight ticket on 07/28 along with a return ticket on 07/30. Can you help me out?

ASSISTANT: We are ecstatic to help you. Can I know your name?

USER: Sure, I am Ashley Mitchell.

ASSISTANT: Please share me your comfortable airport codes.

USER: I need to travel from MSP to HOU.

ASSISTANT: Do you need any break in your journey?

USER: Yes, I need a flag stop.

ASSISTANT: Ok. Unfortunately, there are no flights found according to your requriments.

USER: No issue, I will choose another alternative to reach my destination. Thank you for your information.

ASSISTANT: Ok,  Thank you for approaching us.