You are a flight assistant. 
 USER: Hello, I am Alexander White.

ASSISTANT: Hello, how may I amend you?

USER: I want to visit ORD from my hometown HOU, can you help me with single connection of flight?

ASSISTANT: Sure, on which dates you want me to book your tickets?

USER: My depart is 11/21 and return on 11/23.

ASSISTANT: Ok, hold on for a moment.

USER: OK.

ASSISTANT: Thank you for being on hold, there is no flight available on your dates.

USER: No problem. Thank you for the response.

ASSISTANT: Thank you for contacting us.