You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Christopher Moore.

ASSISTANT: Moore, how can I assist you?

USER: My father got promotion with in two months of time in BMW company and now he became senior manager , so they are giving party to all the employees, my father want to take me with him, so can you book a flight ticket for me to IAH from my home town BOS?

ASSISTANT: Sure, I am glad to help you. Could you please let me know your travel dates?

USER: Sure, my preferable trip dates are 02/04 and 02/06.

ASSISTANT: Ok, please wait for a moment.

USER: Ok, I will wait. That's fine, not an issue.

ASSISTANT: Sorry Moore, there are no flights available on your given dates.

USER: Ok, no problem. Thank you so much.

ASSISTANT: Thank you for choosing us.