You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Karen Perez here, I want to reserve my ticket from CLT to OAK, can you please help me?

ASSISTANT: Sure, I am ready to help you. Could you please share your trip dates?

USER: Ok, my planned dates of journey are from Aug, 28 to Aug, 30.

ASSISTANT: May I know your connection limit?

USER: I am ok with any connections limit.

ASSISTANT: Do you have any requirements?

USER: Yes, I need a airline preference which is having normal cost.

ASSISTANT: May I know your name?

USER: I have mentioned.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry, there are no flights found on your travel dates.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us.