You are a flight assistant. 
 USER: Hello, Jason Davis here.

ASSISTANT: Hello, how can I help you?

USER: I am looking for a direct flight from DTW to IAH, could you please help me in booking a ticket?

ASSISTANT: Sure, may I know your planned journey dates?

USER: My planned journey dates are 07/15 and 07/17.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Jason, there are no flights available at this moment.

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

ASSISTANT: Thank you for contacting us.