You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Stephen Wright, can you help me to book a flight within 1000 price?

ASSISTANT: Sure, can I know the travel dates please?

USER: My journey dates are 03/05 and 03/07.

ASSISTANT: Could you please provide the airport codes?

USER: My travelling locations are IAH and DTW.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your dates.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your help.