You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Linda Rodriguez. Could you please book a flight ticket from IAD to HOU?

ASSISTANT: I am here to help you, can I have your travel dates?

USER: Thank you for your response, I want to take off on May 05 and book my return ticket also on May 07.

ASSISTANT: Do you have any other specifications?

USER: I want to departure on morning time so please check with this.

ASSISTANT: Sorry for the inconvenience, there is no flight running on your route.

USER: Oh! It's ok no problem.

ASSISTANT: Thanks for choosing us, have a good day.

USER: Thank you for your information.