You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Melissa Hernandez.

ASSISTANT: Ok, may I know your travel dates to book?

USER: I am looking for a flight from IAH to DFW, can you help me out please?

ASSISTANT: Ok.

USER: My trip dates are from 03/28 till 03/30.

ASSISTANT: Sorry, there are no flights available at your location.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing our service.