You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Please help me in booking flight ticket from ORD to IAH.

ASSISTANT: Sure, could you please share me with your dates of journey?

USER: My trip dates are June 20 to June 22.

ASSISTANT: Please let me know your name?

USER: Betty Harris.

ASSISTANT: Are you looking for any other help from my side please?

USER: My depart should be in the morning.

ASSISTANT: Ok, wait for a mean while please.

USER: Ok.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome.