You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: Myself Sandra Campbell. I want to book a ticket from MCO to IAH, can you please help me?

ASSISTANT: Sure, let me know your travelling dates?

USER: Sure, my journey dates are 05/29 to 05/31.

ASSISTANT: Thank you for your details. Sorry, I have failed in searching a flight for you.

USER: It's ok.

ASSISTANT: Thank you, have a nice day.

USER: Thank you for helping me.

ASSISTANT: Welcome.