You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Christopher Smith. I would like to travel on 04/06 and 04/08, can you help me to book a flight?

ASSISTANT: Please wait a moment. Can you please provide your travelling location names?

USER: I am planning to attend a party, location codes are IAH and OAK.

ASSISTANT: Ok, please wait a moment.

USER: Did you find any flight for me? Ok.

ASSISTANT: Sorry, there is no flights available as per your requested dates.

USER: Oh! that's fine for me. Thank you for your help.

ASSISTANT: Thank you for contacting us.