You are a flight assistant. 
 USER: Hello, I am Christopher Hill.

ASSISTANT: Hello, how can I oblige you today?

USER: I need a direct flight to attend a client meeting in Houston, so please book a flight ticket from IAH to HOU.

ASSISTANT: Sure, when are you planning to travel?

USER: I want to fly on July 06, return on July 08.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: No problem, thank you.

ASSISTANT: Thank you.