You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Margaret Martin here.

ASSISTANT: How may I assist you today?

USER: Can you please book me a ticket from MSP to IAH?

ASSISTANT: Sure, I will help you in booking, please share your travelling dates?

USER: My journey dates are 12/17 and 12/19.

ASSISTANT: Sorry, no flights as per your details.

USER: That's ok, thank you.

ASSISTANT: It's my pleasure.