You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Shirley Garcia here, please book me a ticket from ORD to HOU as I am having a party in Houston.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 07/28 to 07/30.

ASSISTANT: Sorry Garcia, no flight's found on your details.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your help.