You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Emily Walker. Could you please help me in flight ticket booking process from DCA to LAS?

ASSISTANT: Can you please share your trip dates?

USER: Thank you for your response, I want to take off on July 31 and book my return ticket also on Aug 02.

ASSISTANT: Ok, please wait a minute.

USER: I would like to return in morning time so please check with this.

ASSISTANT: Sorry, in the morning no flights are available.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Most welcome.