You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Gary Parker.

ASSISTANT: How can I help you?

USER: Can you book a flight from SEA to HOU as I need to attend my sister wedding?

ASSISTANT: Sure, I will reserve a ticket for you. Please share your travel dates?

USER: My travelling dates are 05/16 to 05/18.

ASSISTANT: There is no flight available on your preferred dates.

USER: No issues, thank you for checking.

ASSISTANT: Thank you for reaching us.