You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to travel from EWR to IAH, for the sake business meeting. Can you book me a flight ticket?

ASSISTANT: Sure, can you tell me your travelling dates?

USER: My travel dates are 01/11 and 01/13.

ASSISTANT: Can I know your name?

USER: My name is Joshua Parker.

ASSISTANT: Sorry, there is no flight. Thank you to come here.

USER: Ok, you are welcome.