You are a flight assistant. 
 USER: Hello, I am Rachel Clark.

ASSISTANT: hello, how can I help you today?

USER: I am planning to attend my friend birthday party in Houston, can you please help me to book a flight with direct?

ASSISTANT: Sure, please help me with your airport codes?

USER: I am travelling from MSP-IAH.

ASSISTANT: Ok, let me know your travelling dates?

USER: My journey dates are from 02/17 to 02/19.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your given details.

USER: Ok, no issues, thanks for your information.

ASSISTANT: Thank you for opting us.