You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to meet my friend at BOS, can you please avail me a flight ticket from IAH?

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are from July 20th to July 22nd.

ASSISTANT: Do you have any preference?

USER: I prefer a direct flight to travel.

ASSISTANT: Let me know your name.

USER: I am Brandon Nelson.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you.