You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Lisa Mitchell here.

ASSISTANT: Mitchell, how can I assist you today?

USER: I have to host a program in MSP, can you please book me a ticket from IAH?

ASSISTANT: Sure, I am here to help you, please share your travelling dates?

USER: Sure, I want to depart from here on 08/07 and return by 08/09.

ASSISTANT: Lisa sorry for the inconvenience, no flights as per your details.

USER: That's ok, thank you for your information.

ASSISTANT: It's my pleasure.