You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a ticket from OAK to HOU. Could you book a ticket?

ASSISTANT: Sure, I will help you. May I know your planned travel dates?

USER: Travel dates are Apr, 7 and Apr, 9.

ASSISTANT: May I know your name please?

USER: My name is Jack Adams.

ASSISTANT: Do you need a connecting flight?

USER: I would be comfortable with single stop over.

ASSISTANT: May I know your other specifications?

USER: I would like to depart in the morning time.

ASSISTANT: Jack Adams, no flights has been found on your planned travel dates.

USER: Thank you.

ASSISTANT: Thank you for reaching us.