You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Angela Walker, can you help me to find a flight from DTW to IAH?

ASSISTANT: Ok, please provide your travelling dates.

USER: My travelling dates are 04/14 and 04/16.

ASSISTANT: Sorry Angela Walker, there is no flight on your route to book a ticket for you.

USER: That's fine, anyway thank you for your information.

ASSISTANT: It's my pleasure. Thanks for contacting us.