You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I planned to meet my cousin in HOU, can you please help me to book a flight ticket from IAH?

ASSISTANT: Sure, can you share me your travelling dates?

USER: I prefer to travel on Jul 11 and Jul 13.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Is there any other specifications?

USER: I prefer to travel in a direct flight.

ASSISTANT: I want to know your good name please.

USER: I am Samuel Turner.

ASSISTANT: Sorry, no flights are found on your travel dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.